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dungdung12389
2 năm trước
Viết cấu hình electron và cho biết loại nguyên tố và tính chất nguyên tố a) Nguyên tử X có điện tích hạt nhân là 36+ b) Nguyên tử X có điện tích hạt nhân là 20+ c) Nguyên tử X có 3 lớp electron, số e ở lớp ngoài cùng là 4 d) Nguyên tố X có 4 lớp e, lớp ngoài cùng có 5e
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